/*
 * 文件名：CorsFilter.java
 * 版权：MoonBox 
 * 修改人：Peter
 * 修改时间：2018年10月10日
 * 修改内容：新增
 */
package com.renzhebiao.lkang.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * TODO 添加类的一句话简单描述。
 * <p>
 * TODO 详细描述
 * 
 * @author Peter
 * @since 1.0.0
 */
public class CorsFilter implements Filter {

    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException,
                                                                                     ServletException {
        HttpServletResponse response = (HttpServletResponse) res;
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Headers", "token,DeviceNO,SerialNO,DeviceType,Content-Type, Accept");// 真正跨域资源请求携带的自定义报头列表。
        HttpServletRequest request = (HttpServletRequest) req;
        String method = request.getMethod().toUpperCase();
        if (method.equals("OPTIONS")) {
            response.setStatus(200);
            return;
        }
        chain.doFilter(req, res);
    }

    public void init(FilterConfig filterConfig) {
    }

    public void destroy() {
    }
}
